please answer this word problem

Discussion in 'Calculator Requests' started by barbie, Feb 28, 2017.

  1. barbie

    barbie New Member

    Two trains leave the station at the same time, one heading east and the other west. The eastbound train travels at
    miles per hour. The westbound train travels at
    miles per hour. How long will it take for the two trains to be
    miles apart?

  2. math_celebrity

    math_celebrity Administrator Staff Member

    Time 1, distance apart is 105 + 85 = 190

    So every hour, the distance between them is 190 * t where t is the number of hours. Set up our distance function:

    D(t) = 190t

    We want D(t) = 494
    190t = 494

    Divide each side by 190
    t = 2.6 hours

Share This Page